NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-07-11 430-258 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL TX
2019-07-11 470-570 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D MONROE GA
2019-07-11 484-742 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F EMMAUS PA
2019-07-11 725-225 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F MESQUITE NV
2019-07-11 802-481 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VT 9450 LEMINGTON VT
2019-07-11 912-420 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D LYONS GA
2019-07-10 276-468 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHLANDS VA
2019-07-10 385-334 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-07-10 469-676 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
2019-07-10 540-792 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CULPEPER VA
2019-07-10 571-463 0–9 XXXall 10 · 4 holders which blocks → VOIP INNOVATIONS, LLC 597F ARCOLA VA
2019-07-09 470-621 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA NE GA
2019-07-09 571-487 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARCOLA VA
2019-07-09 970-561 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WINDSOR CO
2019-07-09 971-354 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2019-07-08 251-310 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 BELLEFONTN AL
2019-07-08 401-328 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H PROVIDENCE RI
2019-07-08 469-965 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX
2019-07-08 629-232 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NASHVILLE TN
2019-07-08 743-202 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2019-07-08 743-212 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E MOUNT AIRY NC
2019-07-08 825-604 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2019-07-08 971-353 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLACKAMAS OR
2019-07-05 236-703 not yet reported which blocks → Iristel Inc. 154E Cranbrook —
2019-07-05 236-704 not yet reported which blocks → Iristel Inc. 154E Dawson Creek —
2019-07-05 365-661 not yet reported which blocks → Iristel Inc. 154E Dunnville —
2019-07-05 463-223 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CARMEL IN
2019-07-05 469-674 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 GRANDPRARI TX
2019-07-05 506-907 not yet reported which blocks → Iristel Inc. 154E Dalhousie —
2019-07-05 612-439 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E TWINCITIES MN
2019-07-05 782-831 not yet reported which blocks → Iristel Inc. 154E Digby —
2019-07-05 825-603 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2019-07-04 249-486 not yet reported which blocks → Iristel Inc. 154E Collingwood —
2019-07-04 581-875 not yet reported which blocks → Iristel Inc. 154E Chicoutimi —
2019-07-04 581-876 not yet reported which blocks → Iristel Inc. 154E Chibougamau —
2019-07-03 228-299 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 PEARLINGTN MS
2019-07-03 332-213 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2019-07-03 438-267 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-07-03 438-268 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-07-03 438-269 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-07-03 438-270 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-07-03 438-271 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-07-03 513-572 0–9 XXXall 10 · 3 holders which blocks → CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS 600F CINCINNATI OH
2019-07-03 647-410 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2019-07-03 657-393 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-07-03 901-450 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F MEMPHIS TN
2019-07-03 985-332 0–9 XXXall 10 · 2 holders which blocks → AT&T - LOCAL 7421 ANGIE LA
2019-07-02 226-794 not yet reported which blocks → Iristel Inc. 154E Chatham —
2019-07-02 276-230 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F ST PAUL VA
2019-07-02 385-344 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J SPANIHFORK UT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.